Safety attachment for elevators



(No Model.)

H. 0. HOOPER. SAFETY ATTACHMENT FOR ELEVATORS. No. 398,728.

Patented Feb. 26, 1889.

N PEIERS. FhMoJ-flhagmpher. wadinglonv D, C.

UNrTEn STATES PATENT OEEi cE.

J HENRY OTIS I-IOOPER, OF SAN FRANCISCO, ASSIGNOR OF ONE-HALF TO JOHNBRESMEN, OF EUREKA, (ALIlKlRNL k SAFETY ATTACHMENT FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No.398,7'28, dated February26, 1889.

Application filed November 1, 1888. fierial No. 289,782. (No inocleld Toa 1/71/1/1/ i/ lit (fly c071 err/1.: 1-1, which passes over the pulleysl at the top lie it known that], HENRY ()Tis llomEJ-got l of theframe-work. 'lheneo passing down it the city and county of SanFrancisco, State of is attached to one arm oi" the bell-crankleverCalifornia,have invented an lniprm'mnent in J, which is lulcruined uponthe top of the 5 Safety Attachments l'or lillevators; and lhereeage,asshown. The arm of theleverto which I by declare the following to be afull, clear, and the rope It is attached extends luin'izontally, exactdescription of the same. and the other arm,extending perpendicularly Myinvention relatestoasatiety-attachnient beside the suspending-re )c oithe eage,is atfor elevator-eages, such as are used for hoisttachedthereto by a small cord or otherwise. to ing purposes in mines orlmildings. This holds the wedge in position above the It consists of agrooved and cl ian neled weight w edge-shaped groove or channel in theweight, traveling upon a guide or guides andconnectandiftheelevator-ropeshouldbreakthe falling h ed with theelevator-cage by a rope passing of the (age would rapidlydraw thechanneled overpulleys atthe top,and in connectionthereweightupward,while the weight of the wedge I 5 with of a wedge-shaped weightfitting into the 1 G, acting upon the arm of the lever by which grooveor channel, said wedge being suspendit is suspended, would pull thisarin upward, ed at a point above the channel, so as to allow 3 thusallowing the wedge to drop and become the weight to travel looselyunless the susfirmly seated in the wedge-shaped groove, so pending-ropeof the cage should break, when, as to bind against the side of theguide-post 20 by means of a lever-arm, the wedge falls into so stronglyas to check any further motion of the groove or channel and bindsbetween it the elevator. and the guide-post, so as to check the move- Inorder to insure the binding of the wedge ment of the cage. against theface of the guide, this face is made Referring to the accompanyingdrawings slightly tapering from bottom to top, being 25 for a morecomplete explanation of inyinven- 1 thinnest or narrowest at the bottomand 7 tion, Figure 1 is a side elevation showin the thickest at the top,so that as the weighttravcage properly suspended by its rope and the elsupward the wedge-shaped space will conparts in their normal position.Fig. 2 shows tin uallybecoine narrower, andwhen the wedge the positionof the parts when the suspendis fixed into the channel the compressionwill 0 ing-rope has broken. be made stronger and stronger until thewhole A is the elevator-cage, traveling between is brought to a stop.guides B in the usual manner and suspended In order to relieve thesudden shock of stopby'a rope, C, by which it is raised and lowpage whenthe wedge is droppedinto the chancred. At any suitable point withrelation to nel or groove, I prefer to make the wedge in 3 5 theelevator-cage and the well in which it two parts with a cushion ofrubber or elastic 8 travels is fixed a vertical guide-post, D. materialbetween them, and this will be com- E is a weight, which is fitted totravel upon pressed by the upward movement of the weight saidguide-post, being grooved for that purafter the wedge is dropped intothe channel, pose, as shown. This weight has a wedgewhich will moregradually bring the cage to 4o shaped channel formed in it adjacent tothe a stop. 0

side of the guide upon which ittravels. The Having thus describedlnyinvention,what I weight is suspended by a rope,F, passing over claimas new, and desire to secure by Letters pulleys in the upper part of thebuilding or Patent, isthe frame-work of the elevator, and this rope 1.The combination, with an elevatoncage 45 is carried down and attached tothe elevatorand its suspending-rope, of a counterbalance cage, so thatthe weight acts as a counter-balweight connected with the cage andtraveling LII ance for the cage. upon a guide, and having a wedge-shapedGis awedge of such form as to fit the wedgegroove or channel ad acent tothe guide, and L shaped groove or channel, previously dethe independentsuspended wedge connected 5o scribed, and this wedgeis suspended byarope, to the cage hanging in line with said groove or channel, so as'tofall therein and bind the wedge against the guide, substantially asherein described.

2. The elevator-cage with its suspendingrope, the counterbalance -weight traveling upon a guide and having the wedge-shaped channel adjacent tothe face of said guide, in combination with a wedge, the rope by whichthe wedge is suspended above the wedgeshaped chanuehand a lever one endof which is connected with the wedge-suspending rope and the other withthe cage-rope, substan- *tially as and for the purpose herein described.

vator-cage, so as to hold the wedge suspended above the groove orchannel in the traveling weight and to allow the wedge to fall into thesaid groove or channel upon the breakage of the cage suspending rope,substantially as herein described.

&. The elevator suspended and traveling between guides, and thecounterbalance-weight connected with the elevator and travelin g upon aguide, and having the wedge-shaped groove or channel formed between itand the guide, in combination with the two-part wedge having an elasticfilling between the two parts,

said wedge being suspended above the groove or channel in the weight, soas to be allowed to fall therein, substantially as herein described.

In witness whereof I have hereunto set my hand.

HENRY OTIS HOOPER.

Vitnesses:

S. H. NoURsE, H. 0. LEE.

